ARC0: Becoming the 'no FAL' ARCHARC0: Thread not mounted

Hi All,
My DB is in NOARCHIVELOG mode. When I try to switch it (using SAPDBA) to ARCHLOG mode, the DB goes into an 'unkown status' and I have to shutdown and startup the DB to get it back in operation. The DB is still in NOARCHIVELOG mode. This is a problem in terms of media recovery.
ARCH: STARTING ARCH PROCESSES
ARC0 started with pid=8
ARC0: Archival started
ARC1 started with pid=9
Thu Apr 12 22:22:00 2007
ARCH: STARTING ARCH PROCESSES COMPLETE
Thu Apr 12 22:22:00 2007
ARC0: Becoming the 'no FAL' ARCH
Thu Apr 12 22:22:00 2007
ARC1: Archival started
Thu Apr 12 22:22:00 2007
ARC0: Becoming the 'no FAL' ARCHARC0: Thread not mounted
Thu Apr 12 22:22:00 2007
ARC1: Becoming the heartbeat ARCH
ARC1: Becoming the heartbeat ARCHARC1: Thread not mounted
What could be the problem? I have search OSS, the alert log and arc log files but to no avail.

Hi,
Use ARCHIVE_ON.BAT and ARVICHE_OFF.BAT ..U can find these 2 batch files under \usr\sap\sid\sys\exe\run
Regards
Umesh K

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ARC0: Becoming the 'no FAL' ARCHARC0: Thread not mounted

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